Annealing-furnace.



H. HILLEBRAND.

ANNEALING FURNACE.

APPLICATION FILED JUNE 5, 1914.

1,166,694. Patented Jan. 4, 1916.

HERMANN I-IILLEBRAND, OF WERDOHL, GERMALIY.

ANNEALIN (Fr-FURNACE,

Application filed J'une 6, 1914. Serial No. 843,376.

To all whom it may concern:

Be 1t known that I, HERMANN HILLE- BRAFD, a subject of the German Emperor,

residing at VVerdohl, \Vestphalia, Germany, have invented an Improved Annealing-Furnace, of which the following is 'a specification.

This invention relates to an annealing furnace of novel construction in which the annealing retort and annexed antechamber are cut off from the atmosphere during charging or discharging by an inclosed interior bell and an exposed exterior lid from which the charge-carrier is adapted to be suspended. v

The invention permits the furnace to be readily controlled and to be continuously worked without ever causing the retort and annexed antechamber to come into communication with the outside air.

The invention also comprises the various other features of construction more fully pointed out in the specification and appended claims.

In the accompanying drawing: Figure 1 is a vertical longitudinal section of part of an annealing furnace embodying my invention, and Fig; 2 a similar section of a modification.

One end of the usual annealing retort a of the furnace communicates with a charging ante-chamber adapted for the reception and removal of the articles to be annealed. This ante-chamber is prolonged vertically to form a pocket 6, in which is accommodated a vertically movable bell 0 which may be operated by a tubular shaft 6 that passes through a stuffing box 6. In the upper side of the ante-chamber there is formed a charging opening, which is surrounded by an interior packing d, which is adapted to form an air tight joint, with the upper flanged end of bell 0. The charging opening may be Specification of Letters Patent.

f Patented Jan. 4', 1916.

rier to the lid, while'the latter is being manipulated, and for automatically releasing it therefrom, after thelid has become sealed. As shown, the lid is' provided with a bail m apertured for the passage of a vertically movable shank h which is packed as at Z and terminates at its upper end in an eye from which the lid is adapted to be suspended. -At its lower end the shank is furnished with a nut or stop that limits the play of the shank, and likewise serves to weight the same. Shank h is provided with a number of teeth to here constitute a rack which is intergeared with a toothedbolt Is by means of 'a pinion i. This bolt projects through lid "g,and is adapted to engage a notch in carrier f, so as to lock the latter to the lid.

When the lid is suspended above the furnace by means of the eyed shank, bolt is forced downward by pinion 2', so as to lock the carrier to the lid. As soon as the lid has become seated, and the pull on shank h has been accordingly relaxed, the shank, owing to its weight, will descend, and thus raise the bolt, so that in this way the carrier the carrier out of the retort into the ante-' chamber, so as to become resuspended from the lid, closing the ante-chamber by raising the bell, and then .lifting the lid together with the carrier.

In the embodiment of the invention shown in Fi g. 2, the retort and pocket Z) extend not below, but above the ante-chamber. In this case the charge carrier rests upon the bottom of the ante-chamber, which is furnished with the interior packing d for the bell 0 and with the exterior packing (Z for the lid g.

I claim:

1. An annealing furnace comprising a retort, a chamber communicating therewith and having one end provided with a charging opening, a bell movable within the chamber and adapted to close against the inner face of said end, a lid adapted to close against the outer face of said end, and a carrier adapted to be suspended from the lid and to be moved through the ante-chamber into the retort.

2. An annealing furnacecomprising a retort, a communicating chamber having one end provided With a charging opening, said chamber being extended vertically beyond said opening, a vertically movable bell inclosed \vithinthe chamber, a lid a carrier adapted to be suspended from the lid, and tobe moved through the ante-chamber into the retort, an interior packing on the chamber-endada'pted to be engagedby the bell, and exteriorpacking on said end adapted to be en a ed by t e d- 3. An annealing furnace comprising a retort, a chamber communicating therewith and having one endprovidedwith a charging opening, abellmovable Within the chamber, and adapted: to close against the inner face of said end, a lid adapted to. close against tlieouter face of said end, a carrier, a vertically movable suspending shank carried by the lid, and a bolt operably connectedtosaid shank and adapted to engage the carrier.

l. An annealing furnace comprising a retort, a chamber communicating therewith and prolonged vertically beyond the retort, a charging opening in one end of the chamber, a bell movable Within the chamber and adapted to close against the inner face of said end, a lid adapted to close against the outer face of said end, and a carrier adapted to engage the lid and to be moved from the chamber into the retort.

In testimony whereof I have hereunto set my signature in the presence of two Wlt.

nesses. .7 e. v,

p HERMANN HILLEBRAND. a s] Witnesses HELEN Nut-En, ALBERT NUrER.

Copies of this patent may obtaiiied for five cents each, by addressing the Commissioner of Patents; Washington, D. C. 

